Blend and enjoy. The PB2 is a powdered form of peanut butter that just makes it way easier to make shakes with peanut butter (you can get it online or at your local grocery store). I have used regular peanut butter in the past but it tends to stick to the blender half the time. The secret ingredient in my mind is the cinnamon. It really gives the shake that cookie taste that I love so much. The cottage cheese sounds weird at first but it gives the shake an ice cream consistency to it.